/Engine/Source/Editor/UnrealEd/Public/Kismet2/ComponentEditorUtils.h
Given an instance of a template and a current value, propagates a default value change to the instance (only if applicable)
template<typename T> static bool ApplyDefaultValueChange ( class [USceneComponent](API\Runtime\Engine\Components\USceneComponent) * InSceneComponent, T & CurrentValue, const T & OldDefaultValue, const T & NewDefaultValue, bool bReregisterComponent )